package com.atguigu.gulimall.ware.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.exception.NoStockException;
import com.atguigu.common.to.StockDetailTo;
import com.atguigu.common.to.StockLockedTo;
import com.atguigu.common.to.mq.OrderTo;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.ware.entity.WareOrderTaskDetailEntity;
import com.atguigu.gulimall.ware.entity.WareOrderTaskEntity;
import com.atguigu.gulimall.ware.feign.OrderFeignService;
import com.atguigu.gulimall.ware.feign.ProductFeignService;
import com.atguigu.gulimall.ware.service.WareOrderTaskDetailService;
import com.atguigu.gulimall.ware.service.WareOrderTaskService;
import com.atguigu.gulimall.ware.vo.*;
import lombok.Data;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.ware.dao.WareSkuDao;
import com.atguigu.gulimall.ware.entity.WareSkuEntity;
import com.atguigu.gulimall.ware.service.WareSkuService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;


@Service("wareSkuService")
public class WareSkuServiceImpl extends ServiceImpl<WareSkuDao, WareSkuEntity> implements WareSkuService {

    @Autowired
    WareSkuDao wareSkuDao;

    @Autowired
    ProductFeignService productFeignService;

    @Autowired
    RabbitTemplate rabbitTemplate;

    @Autowired
    WareOrderTaskService orderTaskService;

    @Autowired
    WareOrderTaskDetailService orderTaskDetailService;

   @Autowired
    OrderFeignService orderFeignService;



//    解锁库存的方法
    private void unLockStock(Long skuId,Long wareId,Integer num,Long taskDetailId){
        //  库存解锁
            wareSkuDao.unlockStoc(skuId,wareId,num);
//            更新库存工作单的状态
        WareOrderTaskDetailEntity entity =new WareOrderTaskDetailEntity();
        entity.setId(taskDetailId);
        entity.setLockStatus(2); //便为已经解锁的状态
        orderTaskDetailService.updateById(entity);
    }


    @Override
    public void unlockStock(StockLockedTo to) {


            //  Long id = to.getId();  //库存工作单的id
            StockDetailTo detail = to.getDetailTo();
            Long detailId = detail.getId();
//解锁
//1.查询数据库关于之歌订单的锁定库存信息
// 有：证明库存锁定成功啦
//        解锁:订单情况，
//            1. 没有这个订单必须解锁，
//        2.有这个订单  不是解锁库存
//              订单状态：  已取消，解锁库存
//                         没取消，不能解锁
// 没有：   库存锁定失败啦，库存回滚啦，这种情况无需解锁

            WareOrderTaskDetailEntity byId = orderTaskDetailService.getById(detailId);
            if (byId != null) {
//            解锁

                Long id = to.getId();
                WareOrderTaskEntity taskEntity = orderTaskService.getById(id);
                String orderSn = taskEntity.getOrderSn();//根据订单号查询订单的状态
                R r = orderFeignService.getOrderStatus(orderSn);
                System.out.println("r对象"+r);
                System.out.println("r.getcode的值"+r.getCode());
              if (r.getCode() == 0) {
//                订单数据返回成功
                    OrderVo data = r.getData(new TypeReference<OrderVo>() {
                    });

                  System.out.println(data);

                    if (data == null || data.getStatus() == 4) {
//                  订单不存在
//                  订单取消解锁库存

                        if(byId.getLockStatus()==1){

                            unLockStock(detail.getSkuId(), detail.getWareId(), detail.getSkuNum(), detailId);
                        }



                    }
                } else {
//                消息拒绝之后，重新放回到队列里面,让别人继续消费解锁
                  throw new RuntimeException("远程服务失败");
                }
            } else {
//无需解锁
            }
    }

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        /**
         * skuId: 1
         * wareId: 2
         */
        QueryWrapper<WareSkuEntity> queryWrapper = new QueryWrapper<>();
        String skuId = (String) params.get("skuId");
        if(!StringUtils.isEmpty(skuId)){
            queryWrapper.eq("sku_id",skuId);
        }

        String wareId = (String) params.get("wareId");
        if(!StringUtils.isEmpty(wareId)){
            queryWrapper.eq("ware_id",wareId);
        }


        IPage<WareSkuEntity> page = this.page(
                new Query<WareSkuEntity>().getPage(params),
                queryWrapper
        );



        return new PageUtils(page);
    }

    @Override
    public void addStock(Long skuId, Long wareId, Integer skuNum) {
        //1、判断如果还没有这个库存记录新增
        List<WareSkuEntity> entities = wareSkuDao.selectList(new QueryWrapper<WareSkuEntity>().eq("sku_id", skuId).eq("ware_id", wareId));
        if(entities == null || entities.size() == 0){
            WareSkuEntity skuEntity = new WareSkuEntity();
            skuEntity.setSkuId(skuId);
            skuEntity.setStock(skuNum);
            skuEntity.setWareId(wareId);
            skuEntity.setStockLocked(0);
            //TODO 远程查询sku的名字，如果失败，整个事务无需回滚
            //1、自己catch异常
            //TODO 还可以用什么办法让异常出现以后不回滚？高级
            try {
                R info = productFeignService.info(skuId);
                Map<String,Object> data = (Map<String, Object>) info.get("skuInfo");

                if(info.getCode() == 0){
                    skuEntity.setSkuName((String) data.get("skuName"));
                }
            }catch (Exception e){

            }


            wareSkuDao.insert(skuEntity);
        }else{
            wareSkuDao.addStock(skuId,wareId,skuNum);
        }
    }

    @Override
    public List<SkuHasStockVo> getSkusHasStock(List<Long> skuIds) {

        List<SkuHasStockVo> collect = skuIds.stream().map(skuId -> {
            SkuHasStockVo vo =new SkuHasStockVo();
            Long count =baseMapper.getSkuStock(skuId);
            if(count ==null){
                count=0L;
            }
            vo.setSkuId(skuId);
//            todo 不加上非空判断，吧没有库存的商品放入到订单中会报错，null值异常，  因为查询出来的值为

                vo.setHasStock(count==0?false:count>0);


            return vo;
        }).collect(Collectors.toList());
        return collect;
    }
//为某个订单锁定库存

/*
* 库存解锁的两种情况
* 1.下单成功， 订单过期没有支付被系统自动取消，被用户手动取消，都要解锁库存
* 2.下单成功后，库存锁定成功，接下来的业务员调用时报，导致订单回滚，之前锁定的 库存就要自动解锁
*
* */
    @Transactional
    @Override
    public Boolean orderLockStock(WareSkuLockVo vo) {

        /*保存库存工作单的详情
        * 方便追溯*/

        WareOrderTaskEntity taskEntity =new WareOrderTaskEntity();
        taskEntity.setOrderSn(vo.getOrderSn());
        orderTaskService.save(taskEntity);




//        1.找到每个商品在哪个仓库有库存
        List<OrderItemVo> locks = vo.getLocks();

        List<SkuWareHasStock> collect = locks.stream().map(item -> {
            SkuWareHasStock stock = new SkuWareHasStock();
            Long skuId = item.getSkuId();
            stock.setSkuId(skuId);
            stock.setNum(item.getCount());
//            查询这个商品在哪里库存
            List<Long> wareIds = wareSkuDao.listWareIdHasStock(skuId);
            stock.setWareId(wareIds);
            return stock;
        }).collect(Collectors.toList());


        Boolean allLock =true;
//2.锁定库存

        for(SkuWareHasStock hasStock:collect){
            Boolean skuStocked=false;
            Long skuId = hasStock.getSkuId();
            List<Long> wareIds = hasStock.getWareId();
            if(wareIds==null || wareIds.size()==0){
//                没有任何仓库有这个商品的库存

                throw  new NoStockException(skuId);
            }
            for(Long wareId:wareIds){
//                成功就是1，不成功0
                Long count=wareSkuDao.lockSkuStock(skuId,wareId,hasStock.getNum());
                if(count==1){
                       skuStocked=true;

                    WareOrderTaskDetailEntity entity = new WareOrderTaskDetailEntity(null, skuId, "", hasStock.getNum(), taskEntity.getId(), wareId, 1);
                    orderTaskDetailService.save(entity);

                    //                   todo 通知mq库存锁定成功
                    StockLockedTo lockdTo =new StockLockedTo();
                    lockdTo.setId(taskEntity.getId());
                    StockDetailTo stockDetailTo =new StockDetailTo();
                    BeanUtils.copyProperties(entity, stockDetailTo);
//                    只发di不行，防止回滚后找不到数据
                    lockdTo.setDetailTo(stockDetailTo);
                    rabbitTemplate.convertAndSend("stock-event-exchange","stock.locked",lockdTo);
                    break;
                }else{
//                    当前仓库锁定失败，重试下一个仓库

                }
            }
            if(skuStocked==false){
//                当前商品所有仓库都没有锁住
              throw  new NoStockException(skuId);
            }

        }
//3.肯定都是全部解锁成功的
        return true;
    }
//防止订单服务卡顿，导致订单状态消息一直改不了 ，库存消息优先到期，查订单状态新建状态，什么都做不了啦
//    导致卡顿的订单永远不能解锁库存
    @Transactional
    @Override
    public void unlockStock(OrderTo orderTo) {
        String orderSn = orderTo.getOrderSn();
//        查一下库存的的转台，防止重复解锁库存
       WareOrderTaskEntity task= orderTaskService.getOrderTaskByOrderSn(orderSn);
        Long id = task.getId();
//        按照库存工作单找到没有  解锁的库存，进行解锁
        List<WareOrderTaskDetailEntity> entities = orderTaskDetailService.list(new QueryWrapper<WareOrderTaskDetailEntity>()
                .eq("task_id", id)
                .eq("lock_status", 1));

        for(WareOrderTaskDetailEntity entity:entities){
            unLockStock(entity.getSkuId(),entity.getWareId(),entity.getSkuNum(),entity.getId());
        }
    }


    @Data
    class SkuWareHasStock{
        private Long skuId;
        private Integer num;
        private List<Long> wareId;
    }

}


